Table 1.

Annual Prevalence of Vitiligo Among Individuals with Employer-Sponsored Insurance in the United States

Population and Variable	Year
	2013	2014	2015	2016	2017
All ages
Patients meeting vitiligo definition and continuously enrolled in a health plan (numerator), n	11,239	16,091	51,048	98,697	107,612
Patients with continuous health plan enrollment (denominator), n	119,443,347	118,266,837	125,870,232	128,795,066	140,998,102
Annual prevalence, %	0.009	0.014	0.041	0.077	0.076
Sensitivity analysis numerator, n	4,244	6,216	18,876	28,277	31,935
Sensitivity analysis annual prevalence, %	0.004	0.005	0.015	0.022	0.023
Age ≥18 years
Patients meeting vitiligo definition and continuously enrolled in a health plan (numerator), n	8,927	12,840	41,165	80,895	88,289
Patients with continuous health plan enrollment (denominator), n	92,846,379	92,036,794	98,202,751	100,177,023	108,927,783
Annual prevalence, %	0.010	0.014	0.042	0.081	0.081
Sensitivity analysis numerator, n	3,214	4,646	14,288	22,166	25,170
Sensitivity analysis annual prevalence, %	0.004	0.005	0.015	0.022	0.023
Age <18 years
Patients meeting vitiligo definition and continuously enrolled in a health plan (numerator), n	2,312	3,251	9,883	17,802	19,323
Patients with continuous health plan enrollment (denominator), n	26,596,968	26,230,043	27,667,481	27,718,043	32,070,319
Annual prevalence, %	0.009	0.012	0.036	0.064	0.060
Sensitivity analysis numerator, n	1,030	1,571	4,588	6,110	6,765
Sensitivity analysis annual prevalence, %	0.004	0.006	0.017	0.022	0.021